tools: mtd-utils: fix disabling tests

Passing --disable-tests does not do anything since upstream commit [0]
("Fix test binary installation") as that commit removed it since there is
already and existing --without-tests compile option to not compile
the tests at all as --disable-tests was just disabling their installation.

So, lets just pass --without-tests instead to disable test compilation.

[0] https://git.infraroot.at/mtd-utils.git/commit/?id=7170a28d46d5db1e7a9da24a5555a194a233ef0b

Fixes: 67efb6a66146 ("tools: mtd-utils: Update to version 2.1.4")
Link: https://github.com/openwrt/openwrt/pull/15791
Signed-off-by: Robert Marko <[email protected]>

tools/mtd-utils/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mtd-utils
 PKG_VERSION:=2.2.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://infraroot.at/pub/mtd/
@@ -33,7 +33,7 @@ HOST_CONFIGURE_VARS+= \
 	UUID_CFLAGS="-I$(STAGING_DIR_HOST)/include/e2fsprogs/uuid"
 
 HOST_CONFIGURE_ARGS+= \
-	--disable-tests \
+	--without-tests \
 	--without-crypto \
 	--without-xattr \
 	--without-zstd \